If I had wanted a greener hue, I’d have used perhaps Coal Black (P3) instead of Periscopes (Vallejo), or indeed a black and green wash. I probably would have used a greener base colour, such as a nice teal or even some Meredius Blue (P3)… Or perhaps a mix of Sombre Grey and Luftwaffe Green (I don’t remember the exact name, but it’s from Panzer Aces, it’s a subdued green that’s not quite olive).

That said, with proper blending, you can have a good gradient from any colour to any colour, so having green shades to a blue and grey base is no obstacle.

In any case, I wouldn’t really have changed the grey tones of the belly… But, what the hell, I could have done it in more yellowish hues to go with green !

The choice of colours is yours… You can pull off any scheme you want, technique isn’t an issue.